Vol.19 No.I 林均品：Mg含量对Al-Mg合金动态再结品的影响 ·51· 8 Tensi H,Dropman P.Z Metalkd,1970,61:518 9 Truszkowski W,Pawlowski A,Dutkiewicz P.Bull Acad Pol Sci Ser Tech,1971,19:55 10 Tutcher M G.The Restoration Mechanism of Al-2Mg Alloy:[Ph.D thesis].University of London, 1979 11 Zaidi M A.The Restoration Mechanism of Al-3Mg alloy:[Ph.D thesis].University of london,1979 12 Horie S,Nakamura T,Fukuzawa Y.Metals,1984,34:78 Effect of Mg Content on Dynamic Recrystallization Behaviours of Al-Mg Alloys Lin Junpin State Key Laboratory for Advanced Metals and Materials,UST Beijing.Beijing 100083,China ABSTRACT Dynamic recrystallization behaviours of Al-Mg alloys during hot deforma- tion are investigated by means of polarized light microscopy and electron microscopy. The results show that dynamic recrystallization takes place in a certain range of parameter Z in Al-2Mg and Al-6Mg alloys and dynamic recrystallization behaviour of Al-9Mg alloy is similar to those materials having a lower stacking fault energy.Dynamic recrystalliza- tion is accelerated by increasing Mg content,which results from that Mg atmospheres impede cross slip of dislocation,so that dynamic recovery is difficult to cccur. KEY WORDS Al-Mg alloy,dynamic recrystallization,Z parameterV o l . 19 N O . l 林均 品: M g 含量对A I 一 M g合 金动态再结 晶的影响 8 T e n s i H , D r o P m an P . 2 M e at 让d , 1 9 7 0 , 6 1 : 5 18 9 T ur s kz o w s ik W , P aw l o w s ik A , D u kt i e w i e z P . B u l l A e ad P o l S e i S e r T e e h , 1 9 7 1 , 1 9 : 5 5 1 0 T u ct h e r M G . T h e R e s t o art i o n M e e h an i s m o f A I 一 Z M g A ll o y : [ Ph . D ht e s i s ] . U in v e rs i ty o f L o dn o n , 19 7 9 1 1 Z a i d i M A . T h e R e s ot r a ti o n M e e h an i s m o f A I 一 3 M g a ll o y : [ P h . D ht e s i s l . U in v e sr i yt o f l o n do n , 1 9 7 9 1 2 H o ir e S , N ak a 刃n u r a T , F uk u az w a Y . M e at l s , 19 8 4 , 3 4 : 7 8 E fe e t o f M g C o n t e n t o n D y n a m i e R e e yr s t a lli z at i o n B e h a v i o u r s o f A I 一 M g A ll o y s L in uJ nP in S at e K e y L a b o art o yr fo r A d v an e e d M e at l s an d M a et ir ia s , U S T B e ij in g , B e ij in g l 0() 0 8 3 , C h i n a A B S T R A C T D yn am i e r e c ry s at lli z iat o n b e h a v i o urs o f A I 一 M g a ll o y s d un g h o t d e of rm a - it o n ar e in v e s t i g a te d b y m e an s o f P o l iar z e d li g h t m i e or s e o Py an d e l e c otr n m i e r o s e o P y . T h e re s u lt s s h o w ht at d y n am i e r e e ry s at lli z at i o n t a k e s P lac e in a e e art in r an g e o f P arm e t e r 2 in A I 一 ZM g an d A I 一 6 M g a ll o y s an d d y n a m i e re e ry s at lli z at i o n b e h a v i o ur o f A I 一 g M g a ll o y 1 5 5而il ar ot ht o s e m at e ir a l s h a v in g a l o w e r s at e k in g af u l t e n e gr y . D yn am i e r e e ry s at lli z a - it o n 1 5 a e e e l e r a t e d b y in e re a s i n g M g e o n t e n t , w h i e h r e s u lst fr o m ht at M g a t m o s Ph e er s l m P e d e e r o s s s liP o f d i s l o e a t i o n , 5 0 ht at d y n am i e er e o v e yr 1 5 d iif e u lt t o e e e ur . K E Y W O R D S A I 一 M g a ll o y , d y n a m i e r e e yr s at lli z at i o n , 2 P ar m e t e r